Andrews, Ernest John, 1863-, Howland, Howard Newell, 1865- joint author · New York, London, The Macmillan company · leaf 266
anordinary plate-holder seems to transmit theserays, as do also flesh, cloth, paper, and manyother substances; while metals, bones, sticksof graphite, etc., seem to form an effectivescreen to the passage of the rays. By reasonof the ability of the rays to pass throughflesh, so-called photographs… … 250 ELECTRICITY 397 Figure 152 shows a photograph of a human hand, whichwas taken by laying the liand upon a covered plate-holder and exposing it forseveral moments with-in a few inches ofthat portion of apowerful Crookestube which emits theRoentgen rays. Therays passing throughthe flesh affected…
Physics
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